【摘要】 采用大功率ＣＯ２激光器对不同含Ｃ量的Ｆｅ－Ｃ合金进行了激光熔凝处理，用光学显微镜、电子探针及Ｘ射线衍射仪等研究了激光熔凝层的组织与性能以及激光加工工艺参数和含Ｃ量对熔池尺寸、硬度的影响，结果表明，Ｆｅ－Ｃ合金经激光熔凝处理后，表层组织细化，硬度显著提高，熔化层中存在碳烧损和氧化现象．更多还原

【Abstract】 High power CO 2 laser was used and laser surface melting was performed on Fe-C alloy with different carbon contents. Optical microscope, electron probe and X-ray diffractometer were used to investigate the structure and properties of laser melted zone and the effect of the technical parameters, the way of cooling and the carbon content on the size of melted pool and surface hardness. The results show that after laser melting, the surface structures are fine, its hardness is obviously increased, and the carbon content is decreased but the oxygen content is raised in melted zone.更多还原